Manifold-heat retainer



2 1927. A c. w. DIMOND MANIFOLD HEAT RETAINER Filed Jan. 16, 1925 gwuehtoz [:1 ar WDi'n-Lnnd Patented Aug. 2, 1927.

UNITED: STATES CLARK W. DIMOND, F MINNEAPOLIS; MINNESOTA.

MANIFOLD-HEAT RETAINER.

Application filed January This invention relates to improvements inmeans for heating the fuel charges of internal. combustion engines.

The primary object of this invention isthe provision of means forutilizing the heat from. the exhaust manifold of an internal combustionengine, in. order to heat the fuel charge passing through the intake.manifold to the engine.

A. further and. important. object of this invention is the provision ofa heater structure of. the abovementioned character which includes meansfor utilizing the heat radiating from. the exhaust manifol'dof aninternal. combustion. engine, for the purpose of heatin fuel charges:in. the, carburetor and in-- taie manifold. of. the internal combustion.engine.

A further objectof this invention. isthe provision, of. aheaterstructureof' the, above mentioned character which includes a section adapted to house the exhaust and1ntake manifold, and a sectionadapted for detachable. connection. with. the first men tioned sectionfor housing the carburetor whereby toutilize the heat from the exhaustmanifold for the purpose of heating the fuel passing through thecarburetor.

Other objects and advantages of this-in.-

Vention will be apparent; during the course of. the. fOllOWiIlg detaileddescription.

Inthe; accompanying drawing, for-minga part of this specification, andwherein: similar, reference characters designate: corresponding partsthroughout the severalviews,

Figure 1 is a fragmentary s-ide. elevation of; an. internal combustionengine, showing the improved heater structure; as cooper-atingwith; theintake and exhaust, manifold onthe. carburetor of the internalcombustion engine,

Figure 2 is an: endlelevation, partly in sec-. tion, of theimprovedheater; structure, showing: the same looking;- toward the frontof the internal combustion engine in cooperat ingz position. with. the"manifold and car buretordetails of the internal? combustion engine.

Figure Stis. a crossxsectional; viewof the heater unit; alone, taken;substantially on the line3-3 of-Figure' 1. I

Figure-4 isan enlarged fragmentary sece tional View of the-heaterunit'alone, taken substantially. onthe line M'ofFigur-e 2, and

Figure5 is a crosszsectionalview. ofizthe 16, 19 25. Serial No. 2,916.

heater unit" alone,*taken substantially onf the line 55 ofFigure 1'.

In the. drawing, wherein for the purpose of'illustration isshown onlythe preferred embodiment 'of'the invention the letter A 11iay 'generallydesignate the internal com- I relation by means-of clamp structures: 14,

which assist in holding the heater structure B. in. position, as will.be subsequently de.-' scribed. The intake manifold 12 includes thedownwardly extending tubular portion:

1 5, whichhas connection with the carburetor. 16 of any approved type. Aconventional. fanst-ructure 17 may be provided. forwardly of theinternal; combustion engine A, for cooling purposes, in accordance withany approved construction. It is well known that" the draft of airpassesover theexhaust, intake, and carburetor. detailsof the internalcombustionengine 'cooling the same, so that the vaporized fuel ispermitted. to pass into the internal combustion engine cylinder-swithout any preheating influence actin thereon. The heater structure Bisprovide in order to. benefit by the heat radiatedfromthe'exhaustmanifold 11,, for the purpose. of. preheatin ,fuel intheWinta-ke manifold and in. the QtlI -b volatile:- j I I Referringtothe structure B the same includes the-section 20' adapted to'housethe. intake and exhaust manifolds, and the section 21-. detachable withrespect to the section. 20' and; adapted for housing the car{ buretor.16;

The sections: 20 and 21 are-preferably constructed'ofecopper, aluminum,or some'analogous metali material, and they- .are prefer ably bent totheir respective'shapes without riveting, and'so' that they can bereadily detacheda with; respect to' each other and with respect. tortheinternalcombustion engine. The section 20 preferably includes the mainbody wall 25, whichupwardlythereof is provided with the laterally.extending. arcuated." top Wall 26: adapted to extendover the top of theexhaust manifoldll and at its edge 28 adapted to rest on the top of thecylinder head of the internal combustion engine. The wall 261s notOfuniformicross section throughout its length, and at the front thereofthe same is notarcuated in cross section, but is preferably flat, as. is

illustrated in the sectional View of Figure wardly and rearwardlyjwith-ja stream-like 5,-so that the edge 29 engages against the side of thecylinder block of the engine? Thesection 2O furthermore includes afront" wall 30, of course, integral with the top and main walls abovementioned, and extending from the top wall 26thence downwardly onanarcuation; thesame with? respect to the internal combustion enginesloping downeifect, for the purpose of enclosing theintalre andexhaustmanifoldstofward oflhthe air stream therefrom. 'll1efroiit ,wall30 merges into the bottomwall 31proyided for disposition below theportion 15 of the in take immediately adjacent the carburetor,

for the purpose of shieldingfthe same. No-

rear walls are proyide'dfor the section 20, and it is tobe noted thatthe compartment 33 provided bythe section 20' receives the intake andexhaust manifolds'of the internal combustion engine for the purpose ofshield tween the carburetor and the internal combustion engine and insubstantially parallelism with the wall 40. [The bottom wall ll extendsfor a short distance upwardly at its 1 forward end, and is provided;with an; attaching flange 4A adapted to' be positioned below the bottomwall 31 of the section 20, for attachment thereto. This I attachmentconsists of a plurality of bolts with wing nuts therefor; three ofthebolts 45 being preferably provided for detachable connection of theflange a l to the wall 31; the wing nuts 46 being'lowermost and exposedwhere they are readily accessible to any one desiring to detach thesections 2Q and 21. It is preferred that the sidewall 40 of thehousing21 having an attaching ear/l8 laterally 1 extending therefrom, which isadapted to be connected to the front wall 25 of the section 20 by meansof 'a bolt 50 and wing nut 51,

withthe wing nut 51 outermost to permit of detachment. a x H x jReferring more particularly to the operation of the invention, it isto'be' noted from Figure? ofthe dra .ving,'that the section 20 whenplaced 111' assembled relation against the internal combustion engine isclamped thereto by means of the clamping structures l l conventionallyused with the engine A.- *For this purpose a plurality of openings areprovided in the wall 25 to' receivethe bolts of the clampingstructures14-. thereto. The sect on 21 assembled iii-this relation to the in'terial combustion engine provides a'con'ipartment which is enclosed at the:lfrontexcept for the forward opening 55 between the lateral edgeof thefront wall 30 and theengine block, for the purpose of permitt ng the airfrom the fan 1'? to pass alongthecylinder bloclr at a point below theintake manifold12 to permit the cooling effect of the air upon thecylinder casing, w hout interferin with the downwardpas sage of heatfrom the exhaust manifold to thecarburetor casing 21.; The heat passesdownwardly through the compartment 33,. and into the carburotor casing21, since the sections -20 and 21 arecommunicating', as is;

illustrated in Figure ofthe drawing; and

asthe housing 21 is in spaced relation to the carburetor, the heat maypass readily thenc about forpreheating the fuelthereinfl No topwallisprovided forthe casing" 21,50. thatthe heat after passing about thecarburetor may escape. Suitable, openings are provided in the bottom wall41 and the rear wall 4-2 of the housingf2l forreceiving the drain cockand fuel line details*60yand*6l respectively of' thecarburetor. Since notop wall is provided forthe housing or section 21, the carburetoroperatingdetails' are at alltimes accessible.- it

From the foregoingdescription of thisin vention itis apparent that aheater unit for rendering the fuel of internal combustion engines morevolatile has 'been provided, which is relatively simple in character,and one which can-be easily attached. Itginvolyes a correct principle inthat itdoes not interfere with the cooling efiiciency of the fan, andyet permits proper direction of heat to the carburetor and to the intakemanifold. The carburetor section 21 need only be employed in extremelycold weather, and in summer this section 21 may be readily detached, and"the section 20 utilized by itself,-since it, has been found that thesection 20 is then only necessary. to preheat the fuel tothe properdegree. It is to benoted that the carburetor is especially protectedforwardly and below the same, andwhen and at all events will preventcold air drafts from passing about the carburetor.

Various changes 1n the' shape, sizeyand ar rangement of parts may bemade to the form of'the invention; herein. shown and described,

Without departing from the spirit of the invention or the scope of theclaims.

I claim:

1. As an article of manufacture a heater structure for internalcombustion engines including a section providing a main side wall, a topwall, a front wall, and a bottom wall, said section being open at therear, a second section including a bottom wall, a side wall, a rearwall, and being open upwardly thereof, and means detachably connectingsaid sections so that the compartments therein are in. communication atthe lower portion of the first mentioned section.

2. In combination with an internal'combustion engine and including acylinder block, intake and exhaust manifolds, and a carburetor, ahousing for enclosing the intake and exhaust manifolds and-including asingle side wall, a top Wall arcuating over the exhaust manifold, and aforward wall arcuating in stream line manner from the top Walldownwardly along the cylinder block in rearwardly sloping relation toprotect the intake and exhaust manifolds from air currents fromforwardly of the internal combustion engine, a bottom wall for saidcasing adjacent said carburetor, and a carburetor casing including anouter side Wall, an arcuate rear wall, a short inner side wall, abottom, and being open at the top thereof, and means detachablyconnecting the carburetor casing with said first mentioned heater casingto permit flow of heat from the first mentioned housing into the car-'buretor casing between carburetor.

CLARK W. DIMOND.

the same and said

